CN114892393A

CN114892393A - Carbon fiber device based on MXene phase modification

Info

Publication number: CN114892393A
Application number: CN202210762151.5A
Authority: CN
Inventors: 谭晶; 丁奇胜; 宋立健; 程礼盛; 丁玉梅; 杨卫民
Original assignee: Beijing University of Chemical Technology
Current assignee: Beijing University of Chemical Technology
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-08-12
Anticipated expiration: 2042-06-29
Also published as: CN114892393B

Abstract

The invention discloses a MXene phase-based modified carbon fiber device which comprises a base support, a linear motion guide rail, a filament releasing device, a filament collecting device, carbon fiber filaments, two liquid containing tanks, a filament pressing device, a PH detection and liquid changing device, a cleaning and drying integrated device and a PLC (programmable logic controller). The fiber is pulled and straightened by the fiber releasing device and the fiber collecting device, when the fiber is soaked, the electric motors on the fiber releasing device and the fiber collecting device stop braking, when the fiber enters the solution tank, the fiber releasing device also moves to the solution tank along the transverse guide rail, the spring compresses, after soaking is completed, the fiber leaves the solution tank, the fiber releasing device returns to the initial position under the action of the elastic force of the spring, and the fiber is straightened again. The carbon fiber can be repeatedly soaked in the PDAC solution and the MXene phase solution, the structure of the carbon fiber cannot be damaged, and meanwhile, under the coordination of the yarn winding device, the yarn unwinding device, the yarn pressing device, the solution tank moving device and the liquid changing device, the PLC controller is used for controlling, and the device can realize the staged continuous preparation of the MXene modified carbon fiber yarn.

Description

Carbon fiber device based on MXene phase modification

Technical Field

The invention relates to a carbon fiber surface modification device, aims to improve the electromagnetic shielding performance of a carbon fiber-based composite material and develop a high-performance electromagnetic shielding composite material, and belongs to the field of carbon fiber surface modification.

Background

MXene (layered transition metal carbon/nitride) is a novel two-dimensional nano material, has ultrahigh conductivity and excellent electromagnetic shielding function, can form good interface combination with various materials to prepare a composite material with excellent performance, and is a new way for preparing novel fiber materials with high conductivity and excellent electromagnetic shielding performance. The MXene has extremely excellent electromagnetic shielding performance due to the ultrahigh conductivity, and in addition, the MXene has rich-OH, -O, -F and other groups, and can form stable hydrogen bonds or covalent bonds with polymers in the composite material, so that the mechanical property of the composite material is improved.

Metal and metal matrix composite materials are commonly used as electromagnetic shielding materials, but the carbon fiber composite materials have the advantages of light weight, good corrosion resistance, good flexibility and the like, and are ideal electromagnetic shielding materials, however, the density is high, the corrosion resistance is poor, and the processing cost is high. The carbon fiber can form a good conductive network in itself, when electromagnetic waves are transmitted between the carbon fibers, eddy current loss can occur in the fibers and be absorbed along with the increase of incident electromagnetic wave frequency, wave absorption performance of the carbon fibers is embodied, meanwhile, the other part of electromagnetic waves can be scattered between each bundle of carbon fibers and are subjected to phase cancellation, reflection of the electromagnetic waves is reduced, and the carbon fibers have a better electromagnetic shielding effect.

Researches show that the single use of carbon fiber as a wave-absorbing and shielding material has the defects of low magnetic conductivity, high dielectric constant, low absorption strength, narrow absorption band and the like. The conductivity of the carbon fiber is expected to be further improved, so that a method is urgently needed to be adopted for treating the surface of the carbon fiber, enhancing the electromagnetic shielding function of the carbon fiber and simultaneously not damaging the structure of the carbon fiber. MXene serving as a novel two-dimensional material has excellent conductivity and electrochemical properties, and the electromagnetic shielding performance of the MXene can be further improved by compounding the MXene with carbon fibers.

On the modification device, for the modified device of carbon fiber in the past, under the limited condition in space, can't realize soaking the modification many times repeatedly to carbon fiber silk, because the degree of automation of device is low simultaneously, lead to soaking at two kinds of solutions at every turn after need the manual work wash the stoving to and trade the silk and carry out the soaking of next solution.

In order to solve the problems, the invention provides a staged continuous device which can adopt MXene coating to modify carbon fibers, so that an MXene coating with uniform and stable thickness can be formed on the surface of the carbon fibers, the conductivity of the carbon fibers is further improved, and the staged continuous device is expected to play an important role in the fields of electromagnetic shielding of carbon fiber composite materials and the like.

Disclosure of Invention

The invention provides an MXene phase modification-based carbon fiber device, which forms an MXene layer by self-assembling charges continuously and alternately soaked on the surface of carbon fibers so as to improve the electromagnetic shielding function of the carbon fibers and realize staged continuous preparation.

The invention is realized by the following technical scheme: an MXene phase-based modified carbon fiber device, comprising: the device comprises a base support, a linear motion guide rail, a filament releasing device, a filament collecting device, carbon fiber filaments, two liquid containing tanks, a filament pressing device, a PH detection and liquid changing device, a cleaning and drying integrated device and a PLC. The filament unwinding device and the filament winding device are respectively arranged at two ends of a transverse linear motion guide rail on a base support, the filament unwinding device is in sliding connection with the base support, the filament winding device is fixed, two liquid containing tanks are arranged at the left side and the right side of a longitudinal guide rail and can move along the guide rail, the guide rails are ball screw type guide rails, PDAC (Poly dimethyl ammonium chloride) and MXene solution are filled in the two liquid containing tanks, wherein the PDAC is positively charged, and the MXene is negatively charged. The cleaning and drying integrated device is arranged on a transverse guide rail between the wire releasing device and the wire collecting device and is close to one side of the wire collecting device. The carbon fiber is pre-tightened under the action of the fiber releasing and receiving device, the motor drives the PDAC solution tank on the left side of the longitudinal guide rail to move to the lower side of the fiber, the motor drives the lower fiber pressing roller to press the fiber into the PDAC solution tank for soaking, in the downward moving process of the fiber pressing roller, the fiber releasing device starts to move rightwards under the tension action of the fiber and starts to compress a spring (the tension of the carbon fiber is far greater than the elastic force of the spring and is enough to drive the fiber releasing device to slide on the base support), the fiber reaches the bottom of the solution tank and stops when the soaking is finished, the fiber pressing roller moves upwards, at the moment, the carbon fiber is straightened under the tension of the spring on the fiber releasing device and is separated from the PDAC solution tank, and then the solution tank is driven by the motor to return to the original position. And meanwhile, the cleaning and drying device moves along the transverse guide rail, cleans and rapidly dries the carbon fiber wire, and returns to the initial position after the cleaning and drying is finished. Likewise, the MXene solution tank to the right of the longitudinal rail repeats the above steps. The MXene coating can be uniformly and stably obtained on the surface of the carbon fiber by repeating the processes, and the whole device is controlled by a PLC (programmable logic controller).

The invention relates to a carbon fiber device based on MXene phase modification. The cellosilk is pulled by filament delivery device and receipts silk device and is flare-outed, and when the cellosilk soaked, the motor braking stopped on filament delivery device and the receipts silk device, and when the cellosilk got into the solution tank, the filament delivery device also removed to the solution tank along transverse guide, and the spring compression, after soaking, when the cellosilk left the solution tank, the filament delivery device got back to initial position because spring elastic force effect, and the cellosilk is flare-outed again this moment.

The invention relates to an MXene phase modification-based carbon fiber device, which comprises a PDAC solution tank and an MXene solution tank which are respectively arranged at the left side and the right side of a transverse guide rail of a base bracket, wherein when a PDAC solution is soaked, a motor drives the solution tank containing the PDAC solution to move from the left side of a ball screw guide rail to the lower side of a fiber filament, the fiber filament is pressed into the solution tank by a filament pressing roller to be soaked, the filament pressing roller moves upwards after soaking, the fiber filament is straightened and tightened to leave the solution tank due to an elastic device, then the motor drives the PDAC solution tank to leave and return to the original position, the fiber filament is cleaned and dried in the next step, and then the MXene solution is soaked again according to the steps.

The invention relates to a device for modifying carbon fiber based on MXene phase, wherein, the fiber running rollers are arranged at the beginning and the end of a solution tank along the fiber running direction, and the fiber running rollers are driven rollers and are used for preventing the carbon fiber from being damaged by friction with the wall surface of the solution tank. Perpendicular to walk the silk direction, install the silk device at the lateral wall department of solution pond, drive by pressing the silk motor, when carbon fiber got into PDAC or MXene solution, the silk roller moved to the solution pond bottom along ball screw formula guide rail, in impressing the carbon fiber into solution under the roller pressure effect, when the carbon fiber will leave the solution tank, the motor drove the silk roller and shifts up, and the device of putting the silk simultaneously gets back to the initial position under the spring tension effect, and the carbon fiber silk is tightened once more, leaves the solution tank.

The invention relates to an MXene phase-based modified carbon fiber device, wherein a PH value detection and liquid exchange device is arranged in a solution pool and used for detecting the change of the PH value of a solution in the pool and exchanging the solution, the PH value of the solution is maintained at 4-7, and the solution is automatically exchanged for the solution pool again through the liquid exchange device after the PH value is changed.

The invention relates to an MXene phase-based modified carbon fiber device, wherein a cleaning and drying integrated device is arranged on a transverse guide rail between a filament releasing device and a filament collecting device, the cleaning and drying integrated device can be driven by a motor to move along a transverse ball screw guide rail, the initial position of the cleaning and drying integrated device is positioned at the tail end of the transverse guide rail and close to the filament collecting device, and carbon fiber filaments pass through the middle of two solution tanks by the filament releasing device, then pass through a box body of the cleaning and drying integrated device and are finally drawn to the filament collecting device. The design of the box body of the part can prevent the influence of the washed water solution and the dried water vapor on the pH value of the solution caused by the water vapor entering the solution tank. The cleaning and drying device moves along the advancing direction of the carbon fiber in the working process to clean and dry, and then returns to the original position.

The invention has the advantages that: the PDAC solution and the MXene phase solution can be repeatedly soaked in the carbon fiber, an MXene coating can be uniformly deposited on the surface of the carbon fiber, the structure of the carbon fiber cannot be damaged, and the MXene modified carbon fiber can be continuously prepared in a staged manner under the cooperation of the yarn winding device, the yarn unwinding device, the yarn pressing device, the solution tank, the motors and the liquid changing device.

Drawings

Fig. 1 is a schematic structural diagram of a modified carbon fiber device based on an MXene phase.

Fig. 2 is a schematic structural diagram of a wire unwinding, wire winding, cleaning and drying integrated device and a guide rail based on an MXene phase modified carbon fiber device.

Fig. 3 is a schematic view of a solution tank device for a carbon fiber device based on MXene phase modification.

Fig. 4 is a schematic view of a fiber yarn solution tank soaking of a carbon fiber device based on MXene phase modification.

Fig. 5 is a cross-sectional view of an integrated fiber cleaning and drying device based on an MXene phase modified carbon fiber device.

The figure includes: 1. the automatic wire drawing machine comprises a base support, a 101 transverse linear guide rail, a 102 longitudinal linear guide rail, a 2 wire drawing device, a 201 wire drawing roller, a 202 wire drawing motor, a 203 spring, a 3 carbon fiber, a 4 PLC controller, a 5 wire feeding roller, a 6 wire pressing device (two solution tank wire pressing devices are the same, and the left wire pressing structure and the right wire pressing structure of each tank are the same, so that only one side is introduced), a 601 wire pressing motor, a 602 wire pressing roller, a 603 wire pressing guide rail, a 7 two solution tanks (a 701PDAC solution tank moving motor, a 702MXene solution tank moving motor, 703, PDAC solution tanks, 704 and MXene solution tanks), an 8 PH detection and liquid changing device, a 9 cleaning-drying integrated device, a 901 cleaning and drying device moving motor, a 902 cleaning device, a 903 drying device, a 10 wire collecting device, a 1001 wire collecting motor and a 1002 wire collecting roller.

Detailed Description

The inventive device will be described in detail below with reference to the accompanying figures 1-5.

The invention discloses a staged continuous device based on MXene modified carbon fiber, which is shown in the overall structural diagram and distribution diagram of fig. 1-5 and comprises a base support 1, a transverse linear guide rail 101, a longitudinal linear guide rail 102, a filament releasing device 2, a filament releasing roller 201, a filament releasing motor 202, a spring 203, carbon fiber 3, a PLC (programmable logic controller) 4, a filament moving roller 5, a filament pressing device 6, a filament pressing motor 601, a filament pressing roller 602, a filament pressing guide rail 603, solution tanks 7 (the left and right are respectively provided with a PDAC (Polymer AC) solution tank 703 and a MXene solution tank 704), a PDAC solution tank moving motor 701, an MXene solution tank moving motor 702, two PH detection and liquid exchange devices 8, (the MXene solution tank and the PDAC solution tank are respectively provided with the same structure and device, only the MXene solution tank structure and device is introduced), a cleaning device and drying integrated device 9, a cleaning and drying device moving motor 901, a cleaning device 902, a drying device and a drying device, A drying device 903, a wire collecting device 10, a wire collecting motor 1001 and a wire collecting roller 1002; the guide rails on the device are all linear ball screw guide rails, the motors all adopt stepping motors, and the rest rollers except the wire releasing roller 201 and the wire collecting roller 1002 are driving rollers are driven rollers. The wire unwinding device 2 and the wire winding device 10 are arranged at the front end and the rear end of a transverse guide rail 101 on a base support 1, the wire unwinding device 2 is connected with the support 1 in a sliding mode, the wire unwinding device 2 is connected with the support 1 through a spring 203, and the wire winding device is fixed. The two solution tanks 7 are arranged on the left side and the right side of a longitudinal guide rail 102 on a base support, and move on the longitudinal linear ball screw guide rail under the driving of solution

tank moving motors

701 and 702, the carbon fiber wire 3 is straightened by a wire releasing device 2 and a wire collecting device 10, the cleaning and drying integrated device 9 is arranged on a transverse linear motion guide rail 101, and is driven to move on the transverse linear ball screw guide rail by a cleaning and drying moving motor 901, and the initial position is positioned on the left side of the wire collecting device 10. Two pH detection and liquid change devices 8 are respectively arranged at the bottoms of the

solution tanks

702 and 703, and can automatically change the liquid when the pH value of the solution deviates from a specified value (4-7), and the whole device is controlled by the PLC 4.

The invention relates to a carbon fiber device based on MXene phase modification, which comprises the following specific working implementation modes: when the staged continuous work is carried out, the carbon fiber 3 is pre-tightened under the action of the

stepping motors

202 and 1001 on the filament unwinding device 2 and the filament winding device 10, the stepping motor 701 drives the PDAC solution tank 703 at the left side of the longitudinal linear ball screw guide rail 102 to move to the position below the fiber filament 3, the filament pressing roller 602 is driven by the filament pressing motor 601 on the filament pressing device 6 to press the fiber filament into the PDAC solution tank 703 along the ball screw guide rail 603 for soaking, the

motors

202 and 1001 on the filament unwinding device 2 and the filament winding device 10 are braked and stopped in the process that the fiber filament enters the solution tank, the

rollers

201 and 1002 are stopped, the filament unwinding device 2 starts to move rightwards under the tension of the fiber filament 3 and starts to compress the spring 203 until the filament pressing roller 602 drives the fiber filament 3 to reach the bottom of the solution tank 703 and stop, and the filament pressing roller 602 moves upwards after the soaking time is finished, at the moment, the carbon fiber filament 3 is pulled straight and separated from the PDAC solution tank 703 under the tension of the spring 203 on the filament unwinding device 2, the solution tank 703 is then returned to the original position by the motor 701. Meanwhile, under the action of the cleaning and drying motor 901, the cleaning and drying device 9 moves along the transverse linear ball screw guide rail 101 to clean and rapidly dry the carbon fiber wires. Likewise, the MXene solution tank on the right side of the longitudinal rail repeats the above steps. And finishing the treatment period of PDAC soaking-drying-MXene soaking-drying. The whole process is automatically controlled by the PLC 4, and the uniform and stable MXene coating can be obtained on the surface of the carbon fiber by repeating the process (usually circulating for four times). Then, the filament is soaked in the next section of the fiber under the driving of the filament releasing motor 202 and the filament collecting motor 1001.

The invention relates to a device for continuously preparing modified carbon fiber based on MXene, a solution tank is shown in figure 3, wherein the solution tank (the MXene solution tank and a PDAC solution tank have the same structure and device, so that the MXene solution tank is only described in the structure and device) comprises a wire feeding roller 5, a wire pressing device 6, a wire pressing motor 601, a wire pressing roller 602, a wire pressing guide rail 603 and a PH detection and liquid changing device 8. The feed roller 5 is a driven roller to prevent the fiber from contacting the solution tank, the feed roller 602 is driven by the feed motor to move along the feed guide 603 (ball screw type), the pH value in the solution tank is maintained between 4 and 7, and when the pH value deviates from this range, the pH detection and liquid changing device 8 automatically detects and changes the liquid.

The invention relates to a MXene-based modified carbon fiber continuous device, wherein a fiber filament soaking process is shown in FIG. 4, a filament pressing roller 602 is driven by a filament pressing motor 601 to move towards the bottom of a solution tank 7 along a filament pressing guide rail 603, a fiber filament 3 is pressed into the bottom of the solution tank for soaking by a filament pressing roller 602 through a filament running roller 5, at the moment,

motors

202 and 1001 of a filament releasing device 2 and a filament collecting device 10 are in a braking stop state, and the filament releasing device 2 is close to the solution tank under the action of tension of the fiber filament 3 (the tensile strength of the carbon fiber is far greater than the elastic force of a spring 3 and is enough to drive the filament releasing device to slide on a base support). After the fiber yarn 3 is soaked in the solution tank 7 for at least 15min, the yarn pressing roller 602 returns to the initial position under the driving of the yarn pressing motor 601, at the moment, the tension of the fiber yarn 3 is reduced, the yarn releasing device also returns to the initial position due to the elasticity of the spring 203, the fiber yarn 3 is straightened again, and the next step of cleaning and drying is carried out.

The invention relates to a MXene-based modified carbon fiber serialization device.A structural cross-sectional view of a cleaning and drying integrated device 9 is shown in FIG. 5, and the device comprises a cleaning and drying device moving motor 901, a cleaning device 902 and a drying device 903, wherein the two devices are arranged in a box body, the cleaning device 902 is arranged at two sides of the box body, water is supplied from the left side of the bottom, water is drained from the right side, the drying device 903 is arranged at the upper side of the box body, and hot air is used for drying. The carbon fiber yarn is drawn to the yarn receiving device through the yarn releasing device, the two solution tanks and the cleaning and drying integrated device, the initial position of the integrated device is on the left side of the yarn receiving device, after the fiber yarn is soaked, the solution tanks move to the two sides, the cleaning and drying integrated device starts to move on the guide rail by the cleaning and drying device moving motor 901, the fiber yarn is cleaned and dried along the transverse guide rail 101, and the carbon fiber yarn returns to the initial position after the cleaning and drying integrated device is completed. Therefore, the design of the box body can not only quickly clean and dry the solution on the fiber, but also prevent the cleaning solution from splashing to influence the pH of the solution in the solution tank.

Claims

1. The utility model provides a carbon fiber device based on MXene looks modification which characterized in that: the device comprises a base support, a linear motion guide rail, a filament releasing device, a filament collecting device, a carbon fiber filament, two liquid containing tanks, a filament pressing device, a PH detection and liquid changing device, a cleaning and drying integrated device and a PLC (programmable logic controller), wherein the filament releasing device and the filament collecting device are respectively arranged at two ends of the transverse linear motion guide rail on the base support, the filament releasing device is in sliding connection with the base support and can move along the transverse linear motion guide rail through stretching and spring compression of the fiber filament, the filament collecting device is fixed, the two liquid containing tanks are arranged at the left side and the right side of a longitudinal guide rail and can move along the guide rail, the guide rails are ball screw type guide rails, PDAC (polymer dispersed organic phase) and MXene solution are filled in the two liquid containing tanks, the PDAC is positively charged, and the MXene is negatively charged; the cleaning and drying integrated device is arranged on a transverse guide rail between the wire releasing device and the wire collecting device and is close to one side of the wire collecting device; the carbon fiber is pre-tightened under the action of the fiber releasing and receiving device, the motor drives the PDAC solution tank on the left side of the longitudinal guide rail to move to the lower side of the fiber, and the motor drives the lower fiber pressing roller to press the fiber into the PDAC solution tank for soaking; a PH value detection and liquid change device is arranged in the solution pool and used for detecting the change of the PH value of the solution in the pool and changing the solution, and the PH value of the solution is maintained at 4-7; the whole device is controlled by a PLC controller.

2. The device for modifying carbon fiber based on MXene phase as claimed in claim 1, wherein: the filament unwinding device and the filament winding device are arranged at the front end and the rear end of a transverse guide rail on the base support, the filament unwinding device is connected with the base support in a sliding mode and is connected with the support through a spring, the filament winding device is fixed, and the fiber filaments are pulled and straightened by the filament unwinding device and the filament winding device.

3. The device for modifying carbon fiber based on MXene phase according to claim 1, wherein: the wire moving rollers are driven rollers which are used for preventing the carbon fibers and the wall surface of the solution tank from being damaged due to friction along the wire moving direction of the carbon fibers; and a wire pressing device is arranged on the side wall of the solution tank and is driven by a wire pressing motor, and when carbon fibers enter PDAC or MXene solution, a wire pressing roller moves to the bottom of the solution tank along a ball screw type guide rail and presses the carbon fibers into the solution under the pressure of the roller.

4. The device for modifying carbon fiber based on MXene phase as claimed in claim 1, wherein: the cleaning and drying integrated device comprises a cleaning and drying device moving motor, a cleaning device and a drying device, wherein the two devices are installed in a box body, the cleaning device is installed on two sides of the box body and is used for supplying water from the left side of the bottom, water is drained from the right side, and the drying device is installed on the upper side of the box body and is used for drying by hot air.